<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2010 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id$

/**
 +------------------------------------------------------------------------------
 * ThinkPHP内置模板引擎类
 * 支持XML标签和普通标签的模板解析
 * 编译型模板引擎 支持动态缓存
 +------------------------------------------------------------------------------
 * @category   Think
 * @package  Think
 * @subpackage  Template
 * @author liu21st <liu21st@gmail.com>
 * @version  $Id$
 +------------------------------------------------------------------------------
 */
class  ThinkTemplate extends Think
{//类定义开始

// 模板页面中引入的标签库列表
protected $tagLib          =  array();
// 当前模板文件
protected $templateFile  =  '';
// 模板变量
public $tVar                 = array();
public $config  =  array();
private   $literal = array();

/**
 +----------------------------------------------------------
 * 取得模板实例对象
 * 静态方法
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @return ThinkTemplate
 +----------------------------------------------------------
 */
static public function  getInstance()
{
	return get_instance_of(__CLASS__);
}

/**
 +----------------------------------------------------------
 * 架构函数
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param array $config 模板引擎配置数组
 +----------------------------------------------------------
 */
public function __construct(){
	$this->config['cache_path']        =  C('CACHE_PATH');
	$this->config['template_suffix']   =  C('TMPL_TEMPLATE_SUFFIX');
	$this->config['cache_suffix']       =  C('TMPL_CACHFILE_SUFFIX');
	$this->config['tmpl_cache']        =  C('TMPL_CACHE_ON');
	$this->config['cache_time']        =  C('TMPL_CACHE_TIME');
	$this->config['taglib_begin']        =  $this->stripPreg(C('TAGLIB_BEGIN'));
	$this->config['taglib_end']          =  $this->stripPreg(C('TAGLIB_END'));
	$this->config['tmpl_begin']         =  $this->stripPreg(C('TMPL_L_DELIM'));
	$this->config['tmpl_end']           =  $this->stripPreg(C('TMPL_R_DELIM'));
	$this->config['default_tmpl']       =  C('TMPL_FILE_NAME');
	$this->config['tag_level']            =  C('TAG_NESTED_LEVEL');
}

private function stripPreg($str) {
	$str = str_replace(array('{','}','(',')','|','[',']'),array('\{','\}','\(','\)','\|','\[','\]'),$str);
	return $str;
}

// 模板变量获取和设置
public function get($name) {
	if(isset($this->tVar[$name]))
	return $this->tVar[$name];
	else
	return false;
}

public function set($name,$value) {
	$this->tVar[$name]= $value;
}

// 加载模板
public function load($templateFile,$templateVar,$charset) {
	$this->tVar = $templateVar;
	$templateCacheFile  =  $this->loadTemplate($templateFile);
	// 模板阵列变量分解成为独立变量
	extract($templateVar, EXTR_OVERWRITE);
	//载入模版缓存文件
	include $templateCacheFile;
}

/**
 +----------------------------------------------------------
 * 加载主模板并缓存
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $tmplTemplateFile 模板文件
 * @param string $varPrefix  模板变量前缀
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 * @throws ThinkExecption
 +----------------------------------------------------------
 */
public function loadTemplate ($tmplTemplateFile='')
{
	if(empty($tmplTemplateFile))    $tmplTemplateFile = $this->config['default_tmpl'];
	if(!is_file($tmplTemplateFile)){
		$tmplTemplateFile =  dirname($this->config['default_tmpl']).'/'.$tmplTemplateFile.$this->config['template_suffix'];
		if(!is_file($tmplTemplateFile))
		throw_exception(L('_TEMPLATE_NOT_EXIST_').':'.$tmplTemplateFile);
	}
	$this->templateFile    =  $tmplTemplateFile;

	//根据模版文件名定位缓存文件
	$tmplCacheFile = $this->config['cache_path'].md5($tmplTemplateFile).$this->config['cache_suffix'];
	$tmplContent = '';
	// 检查Cache文件是否需要更新
	if (!$this->checkCache($tmplTemplateFile)) {
		// 需要更新模版 读出原模板内容
		$tmplContent = file_get_contents($tmplTemplateFile);
		//编译模板内容
		$tmplContent = $this->compiler($tmplContent);
		// 检测分组目录
		if(!is_dir($this->config['cache_path']))
		mk_dir($this->config['cache_path']);
		//重写Cache文件
		if( false === file_put_contents($tmplCacheFile,trim($tmplContent)))
		throw_exception(L('_CACHE_WRITE_ERROR_').':'.$tmplCacheFile);
	}
	return $tmplCacheFile;
}

/**
 +----------------------------------------------------------
 * 编译模板文件内容
 +----------------------------------------------------------
 * @access protected
 +----------------------------------------------------------
 * @param mixed $tmplContent 模板内容
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 */
protected function compiler( $tmplContent)
{
	//模板解析
	$tmplContent = $this->parse($tmplContent);
	if(ini_get('short_open_tag'))
	// 开启短标签的情况要将<?标签用echo方式输出 否则无法正常输出xml标识
	$tmplContent = preg_replace('/(<\?(?!php|=|$))/i', '<?php echo \'\\1\'; ?>'."\n", $tmplContent );
	// 还原被替换的Literal标签
	$tmplContent = preg_replace('/<!--###literal(\d)###-->/eis',"\$this->restoreLiteral('\\1')",$tmplContent);
	// 添加安全代码
	$tmplContent  =  '<?php if (!defined(\'THINK_PATH\')) exit();?>'.$tmplContent;
	if(C('TMPL_STRIP_SPACE')) {
		/* 去除html空格与换行 */
		$find     = array("~>\s+<~","~>(\s+\n|\r)~");
		$replace  = array("><",">");
		$tmplContent = preg_replace($find, $replace, $tmplContent);
	}
	return trim($tmplContent);
}

/**
 +----------------------------------------------------------
 * 检查缓存文件是否有效
 * 如果无效则需要重新更新
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $tmplTemplateFile  模板文件名
 +----------------------------------------------------------
 * @return boolen
 +----------------------------------------------------------
 */
protected function checkCache($tmplTemplateFile)
{
	if (!$this->config['tmpl_cache']) // 优先对配置检测
	return false;
	$tmplCacheFile = $this->config['cache_path'].md5($tmplTemplateFile).$this->config['cache_suffix'];
	if(!is_file($tmplCacheFile)){
		return false;
	}elseif (filemtime($tmplTemplateFile) > filemtime($tmplCacheFile)) {
		// 模板文件如果有更新则缓存需要更新
		return false;
	}elseif ($this->config['cache_time'] != -1 && time() > filemtime($tmplCacheFile)+$this->config['cache_time']) {
		// 缓存是否在有效期
		return false;
	}
	//缓存有效
	return true;
}

/**
 +----------------------------------------------------------
 * 模板解析入口
 * 支持普通标签和TagLib解析 支持自定义标签库
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $content 要解析的模板内容
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 */
public function parse($content)
{
	$begin = $this->config['taglib_begin'];
	$end   = $this->config['taglib_end'];
	// 首先替换literal标签内容
	$content = preg_replace('/'.$begin.'literal'.$end.'(.*?)'.$begin.'\/literal'.$end.'/eis',"\$this->parseLiteral('\\1')",$content);

	// 获取需要引入的标签库列表
	// 标签库只需要定义一次，允许引入多个一次
	// 一般放在文件的最前面
	// 格式：<taglib name="html,mytag..." />
	// 当TAGLIB_LOAD配置为true时才会进行检测
	if(C('TAGLIB_LOAD')) {
		$this->getIncludeTagLib($content);
		if(!empty($this->tagLib)) {
			// 对导入的TagLib进行解析
			$_taglibs = C('_taglibs_');
			foreach($this->tagLib as $tagLibName) {
				// 内置标签库
				$tagLibName   = strtolower($tagLibName);
				if(!import('Think.Template.TagLib.TagLib'.ucwords($tagLibName))) {
					// 扩展标签库
					if($_taglibs && isset($_taglibs[$tagLibName]))
					// 'tagLibName'=>'importPath'
					import($_taglibs[$tagLibName]);
					else
					throw_exception($tagLibName.L('_TAGLIB_NOT_EXIST_'));
				}
				$this->parseTagLib($tagLibName,$content);
			}
		}
	}
	// 预先加载的标签库 无需在每个模板中使用taglib标签加载
	if(C('TAGLIB_PRE_LOAD')) {
		$tagLibs =  explode(',',C('TAGLIB_PRE_LOAD'));
		foreach ($tagLibs as $tag){
			$this->parseTagLib($tag,$content);
		}
	}
	// 内置标签库 无需使用taglib标签导入就可以使用
	$tagLibs =  explode(',',C('TAGLIB_BUILD_IN'));
	foreach ($tagLibs as $tag){
		$this->parseTagLib($tag,$content,true);
	}
	//解析普通模板标签 {tagName:}
	$content = preg_replace('/('.$this->config['tmpl_begin'].')(\S.+?)('.$this->config['tmpl_end'].')/eis',"\$this->parseTag('\\2')",$content);
	return $content;
}

/**
 +----------------------------------------------------------
 * 替换页面中的literal标签
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $content  模板内容
 +----------------------------------------------------------
 * @return string|false
 +----------------------------------------------------------
 */
function parseLiteral($content) {
	if(trim($content)=='')
	return '';
	$content = stripslashes($content);
	$i  =   count($this->literal);
	$parseStr   =   "<!--###literal{$i}###-->";
	$this->literal[$i]  = $content;
	return $parseStr;
}

/**
 +----------------------------------------------------------
 * 还原被替换的literal标签
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $tag  literal标签序号
 +----------------------------------------------------------
 * @return string|false
 +----------------------------------------------------------
 */
function restoreLiteral($tag) {
	// 还原literal标签
	$parseStr   =  $this->literal[$tag];
	// 销毁literal记录
	unset($this->literal[$tag]);
	return $parseStr;
}

/**
 +----------------------------------------------------------
 * 搜索模板页面中包含的TagLib库
 * 并返回列表
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $content  模板内容
 +----------------------------------------------------------
 * @return string|false
 +----------------------------------------------------------
 */
public function getIncludeTagLib(& $content)
{
	//搜索是否有TagLib标签
	$find = preg_match('/'.$this->config['taglib_begin'].'taglib\s(.+?)(\s*?)\/'.$this->config['taglib_end'].'\W/is',$content,$matches);
	if($find) {
		//替换TagLib标签
		$content = str_replace($matches[0],'',$content);
		//解析TagLib标签
		$tagLibs = $matches[1];
		$xml =  '<tpl><tag '.$tagLibs.' /></tpl>';
		$xml = simplexml_load_string($xml);
		if(!$xml)
		throw_exception(L('_XML_TAG_ERROR_'));
		$xml = (array)($xml->tag->attributes());
		$array = array_change_key_case($xml['@attributes']);
		$this->tagLib = explode(',',$array['name']);
	}
	return;
}

/**
 +----------------------------------------------------------
 * TagLib库解析
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $tagLib 要解析的标签库
 * @param string $content 要解析的模板内容
 * @param boolen $hide 是否隐藏标签库前缀
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 */
public function parseTagLib($tagLib,&$content,$hide=false)
{
	$begin = $this->config['taglib_begin'];
	$end   = $this->config['taglib_end'];
	require_cache(dirname(__FILE__).'/TagLib/TagLib'.ucwords($tagLib).'.class.php');
	$tLib =  Think::instance('TagLib'.ucwords(strtolower($tagLib)));
	foreach ($tLib->tags as $name=>$val){
		$tags = array();
		if(isset($val['alias'])) {// 别名设置
			$tags = explode(',',$val['alias']);
			$tags[]  =  $name;
		}else{
			$tags[] = $name;
		}
		$level = isset($val['level'])?$val['level']:1;
		$closeTag = isset($val['close'])?$val['close']:true;
		foreach ($tags as $tag){
			// 实际要解析的标签名称
			$parseTag = !$hide?$tagLib.':'.$tag:$tag;
			if(empty($val['attr'])){
				// 无属性标签
				if(!$closeTag) {
					$content = preg_replace('/'.$begin.$parseTag.'(\s*?)\/(\s*?)'.$end.'/eis',"\$this->parseXmlTag('$tagLib','$tag','\\1','')",$content);
				}else{
					for($i=0;$i<$level;$i++)
					$content = preg_replace('/'.$begin.$parseTag.'(\s*?)'.$end.'(.*?)'.$begin.'\/'.$parseTag.'(\s*?)'.$end.'/eis',"\$this->parseXmlTag('$tagLib','$tag','\\1','\\2')",$content);
				}
			}else{
				if(!$closeTag) {
					$content = preg_replace('/'.$begin.$parseTag.'\s(.*?)\/(\s*?)'.$end.'/eis',"\$this->parseXmlTag('$tagLib','$tag','\\1','')",$content);
				}else{
					for($i=0;$i<$level;$i++)
					$content = preg_replace('/'.$begin.$parseTag.'\s(.*?)'.$end.'(.*?)'.$begin.'\/'.$parseTag.'(\s*?)'.$end.'/eis',"\$this->parseXmlTag('$tagLib','$tag','\\1','\\2')",$content);
				}
			}
		}
	}
}

/**
 +----------------------------------------------------------
 * 解析标签库的标签
 * 需要调用对应的标签库文件解析类
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $tagLib  标签库名称
 * @param string $tag  标签名
 * @param string $attr  标签属性
 * @param string $content  标签内容
 +----------------------------------------------------------
 * @return string|false
 +----------------------------------------------------------
 */
public function parseXmlTag($tagLib,$tag,$attr,$content)
{
	//if (MAGIC_QUOTES_GPC) {
	$attr = stripslashes($attr);
	$content = stripslashes($content);
	//}
	if(ini_get('magic_quotes_sybase'))
	$attr =  str_replace('\"','\'',$attr);
	$tLib =  get_instance_of('TagLib'.ucwords(strtolower($tagLib)));
	$parse = '_'.$tag;
	$content = trim($content);
	return $tLib->$parse($attr,$content);
}

/**
 +----------------------------------------------------------
 * 模板标签解析
 * 格式： {TagName:args [|content] }
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $tagStr 标签内容
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 */
public function parseTag($tagStr){
	//if (MAGIC_QUOTES_GPC) {
	$tagStr = stripslashes($tagStr);
	//}
	//还原非模板标签
	if(preg_match('/^[\s|\d]/is',$tagStr))
	//过滤空格和数字打头的标签
	return C('TMPL_L_DELIM') . $tagStr .C('TMPL_R_DELIM');
	$flag =  substr($tagStr,0,1);
	$name   = substr($tagStr,1);
	if('$' == $flag){
		//解析模板变量 格式 {$varName}
		return $this->parseVar($name);
	}elseif(':' == $flag){
		// 输出某个函数的结果
		return  '<?php echo '.$name.';?>';
	}elseif('~' == $flag){
		// 执行某个函数
		return  '<?php '.$name.';?>';
	}elseif('&' == $flag){
		// 输出配置参数
		return '<?php echo C("'.$name.'");?>';
	}elseif('%' == $flag){
		// 输出语言变量
		return '<?php echo L("'.$name.'");?>';
	}elseif('@' == $flag){
		// 输出SESSION变量
		if(strpos($name,'.')) {
			$array   =  explode('.',$name);
			return '<?php echo $_SESSION["'.$array[0].'"]["'.$array[1].'"];?>';
		}else{
			return '<?php echo $_SESSION["'.$name.'"];?>';
		}
	}elseif('#' == $flag){
		// 输出COOKIE变量
		if(strpos($name,'.')) {
			$array   =  explode('.',$name);
			return '<?php echo $_COOKIE["'.$array[0].'"]["'.$array[1].'"];?>';
		}else{
			return '<?php echo $_COOKIE["'.$name.'"];?>';
		}
	}elseif('.' == $flag){
		// 输出GET变量
		return '<?php echo $_GET["'.$name.'"];?>';
	}elseif('^' == $flag){
		// 输出POST变量
		return '<?php echo $_POST["'.$name.'"];?>';
	}elseif('*' == $flag){
		// 输出常量
		return '<?php echo constant("'.$name.'");?>';
	}

	$tagStr = trim($tagStr);
	if(substr($tagStr,0,2)=='//' || (substr($tagStr,0,2)=='/*' && substr($tagStr,-2)=='*/'))
	//注释标签
	return '';

	//解析其它标签
	//统一标签格式 {TagName:args [|content]}
	$pos =  strpos($tagStr,':');
	$tag  =  substr($tagStr,0,$pos);
	$args = trim(substr($tagStr,$pos+1));

	//解析标签内容
	if(!empty($args)) {
		$tag  =  strtolower($tag);
		switch($tag){
			case 'include':
				return $this->parseInclude($args);
				break;
			case 'load':
				return $this->parseLoad($args);
				break;
				//这里扩展其它标签
				//…………
			default:
				if(C('TAG_EXTEND_PARSE')) {
					$method = C('TAG_EXTEND_PARSE');
					if(array_key_exists($tag,$method))
					return $method[$tag]($args);
				}
		}
	}
	return C('TMPL_L_DELIM') . $tagStr .C('TMPL_R_DELIM');
}


/**
 +----------------------------------------------------------
 * 加载js或者css文件
 * {load:__PUBLIC__/Js/Think/ThinkAjax.js} 加载js文件
 * {load:__PUBLIC__/Css/style.css} 加载css文件
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $params  参数
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 */
public function parseLoad($str) {
	$type       = strtolower(substr(strrchr($str, '.'),1));
	$parseStr = '';
	if($type=='js') {
		$parseStr .= '<script type="text/javascript" src="'.$str.'"></script>';
	}elseif($type=='css') {
		$parseStr .= '<link rel="stylesheet" type="text/css" href="'.$str.'" />';
	}
	return $parseStr;
}

/**
 +----------------------------------------------------------
 * 模板变量解析,支持使用函数
 * 格式： {$varname|function1|function2=arg1,arg2}
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $varStr 变量数据
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 */
public function parseVar($varStr){
	$varStr = trim($varStr);
	static $_varParseList = array();
	//如果已经解析过该变量字串，则直接返回变量值
	if(isset($_varParseList[$varStr])) return $_varParseList[$varStr];
	$parseStr ='';
	$varExists = true;
	if(!empty($varStr)){
		$varArray = explode('|',$varStr);
		//取得变量名称
		$var = array_shift($varArray);
		//非法变量过滤 不允许在变量里面使用 ->
		//TODO：还需要继续完善
		if(preg_match('/->/is',$var))
		return '';
		if('Think.' == substr($var,0,6)){
			// 所有以Think.打头的以特殊变量对待 无需模板赋值就可以输出
			$name = $this->parseThinkVar($var);
		}
		elseif( false !== strpos($var,'.')) {
			//支持 {$var.property}
			$vars = explode('.',$var);
			$var  =  array_shift($vars);
			switch(strtolower(C('TMPL_VAR_IDENTIFY'))) {
				case 'array': // 识别为数组
					$name = '$'.$var;
					foreach ($vars as $key=>$val)
					$name .= '["'.$val.'"]';
					break;
				case 'obj':  // 识别为对象
					$name = '$'.$var;
					foreach ($vars as $key=>$val)
					$name .= '->'.$val;
					break;
				default:  // 自动判断数组或对象 只支持二维
					$name = 'is_array($'.$var.')?$'.$var.'["'.$vars[0].'"]:$'.$var.'->'.$vars[0];
			}
		}
		elseif(false !==strpos($var,'::')){
			//支持 {$var:property} 方式输出对象的属性
			$vars = explode('::',$var);
			$var  =  str_replace('::','->',$var);
			$name = "$".$var;
			$var  = $vars[0];
		}
		elseif(false !== strpos($var,'[')) {
			//支持 {$var['key']} 方式输出数组
			$name = "$".$var;
			preg_match('/(.+?)\[(.+?)\]/is',$var,$match);
			$var = $match[1];
		}
		else {
			$name = "$$var";
		}
		//对变量使用函数
		if(count($varArray)>0)
		$name = $this->parseVarFunction($name,$varArray);
		$parseStr = '<?php echo ('.$name.'); ?>';
	}
	$_varParseList[$varStr] = $parseStr;
	return $parseStr;
}

/**
 +----------------------------------------------------------
 * 对模板变量使用函数
 * 格式 {$varname|function1|function2=arg1,arg2}
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $name 变量名
 * @param array $varArray  函数列表
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 */
public function parseVarFunction($name,$varArray){
	//对变量使用函数
	$length = count($varArray);
	//取得模板禁止使用函数列表
	$template_deny_funs = explode(',',C('TMPL_DENY_FUNC_LIST'));
	for($i=0;$i<$length ;$i++ ){
		if (0===stripos($varArray[$i],'default='))
		$args = explode('=',$varArray[$i],2);
		else
		$args = explode('=',$varArray[$i]);
		//模板函数过滤
		$args[0] = trim($args[0]);
		switch(strtolower($args[0])) {
			case 'default':  // 特殊模板函数
				$name   = '('.$name.')?('.$name.'):'.$args[1];
				break;
			default:  // 通用模板函数
				if(!in_array($args[0],$template_deny_funs)){
					if(isset($args[1])){
						if(strstr($args[1],'###')){
							$args[1] = str_replace('###',$name,$args[1]);
							$name = "$args[0]($args[1])";
						}else{
							$name = "$args[0]($name,$args[1])";
						}
					}else if(!empty($args[0])){
						$name = "$args[0]($name)";
					}
				}
		}
	}
	return $name;
}

/**
 +----------------------------------------------------------
 * 特殊模板变量解析
 * 格式 以 $Think. 打头的变量属于特殊模板变量
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $varStr  变量字符串
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 */
public function parseThinkVar($varStr){
	$vars = explode('.',$varStr);
	$vars[1] = strtoupper(trim($vars[1]));
	$parseStr = '';
	if(count($vars)>=3){
		$vars[2] = trim($vars[2]);
		switch($vars[1]){
			case 'SERVER':
				$parseStr = '$_SERVER[\''.strtoupper($vars[2]).'\']';break;
			case 'GET':
				$parseStr = '$_GET[\''.$vars[2].'\']';break;
			case 'POST':
				$parseStr = '$_POST[\''.$vars[2].'\']';break;
			case 'COOKIE':
				if(isset($vars[3])) {
					$parseStr = '$_COOKIE[\''.$vars[2].'\'][\''.$vars[3].'\']';
				}else{
					$parseStr = '$_COOKIE[\''.$vars[2].'\']';
				}break;
			case 'SESSION':
				if(isset($vars[3])) {
					$parseStr = '$_SESSION[\''.$vars[2].'\'][\''.$vars[3].'\']';
				}else{
					$parseStr = '$_SESSION[\''.$vars[2].'\']';
				}
				break;
			case 'ENV':
				$parseStr = '$_ENV[\''.$vars[2].'\']';break;
			case 'REQUEST':
				$parseStr = '$_REQUEST[\''.$vars[2].'\']';break;
			case 'CONST':
				$parseStr = strtoupper($vars[2]);break;
			case 'LANG':
				$parseStr = 'L("'.$vars[2].'")';break;
			case 'CONFIG':
				if(isset($vars[3])) {
					$vars[2] .= '.'.$vars[3];
				}
				$parseStr = 'C("'.$vars[2].'")';break;
			default:break;
		}
	}else if(count($vars)==2){
		switch($vars[1]){
			case 'NOW':
				$parseStr = "date('Y-m-d g:i a',time())";
				break;
			case 'VERSION':
				$parseStr = 'THINK_VERSION';
				break;
			case 'TEMPLATE':
				$parseStr = 'C("TMPL_FILE_NAME")';
				break;
			case 'LDELIM':
				$parseStr = 'C("TMPL_L_DELIM")';
				break;
			case 'RDELIM':
				$parseStr = 'C("TMPL_R_DELIM")';
				break;
			default:
				if(defined($vars[1]))
				$parseStr = $vars[1];
		}
	}
	return $parseStr;
}

/**
 +----------------------------------------------------------
 * 加载公共模板并缓存 和当前模板在同一路径，否则使用相对路径
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $tmplPublicName  公共模板文件名
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 */
public function parseInclude($tmplPublicName){
	if(substr($tmplPublicName,0,1)=='$')
	//支持加载变量文件名
	$tmplPublicName = $this->get(substr($tmplPublicName,1));

	if(is_file($tmplPublicName)) {
		// 直接包含文件
		$parseStr = file_get_contents($tmplPublicName);
	}else {
		$tmplPublicName  = str_replace(array('@',':'),'/',$tmplPublicName);
		$count   =  substr_count($tmplPublicName,'/');
		$path   = dirname(C('TMPL_FILE_NAME'));
		for($i=0;$i<$count;$i++)
		$path   = dirname($path);
		$templateFile =  $path.'/'.$tmplPublicName.$this->config['template_suffix'];
		$parseStr = file_get_contents($templateFile);
	}
	//再次对包含文件进行模板分析
	return $this->parse($parseStr);
}

}//类定义结束
?>